Synthetic Stock Damage

The first year with my FX Wildcat .25 (back in 2017), I was target shooting in the back yard from the shooting table at a 50yd target, having a great time. Then, I heard my wife screaming in the house so I ran in to see if she's ok. It was just a wasp flying around the kitchen. Took care of that and went back outside. And then, I saw it... my gun was on the concrete pavers! There was a slight wind but I never would have thought it was possible to blow over.

The black synthetic stock got a little banged up as well as the side turret on the scope.

Granted, it's been 8 years, but I'd like to see if I can remove the blemish. Any recommendations on how to smooth out a little roughness on the synthetic surface, without hurting the finish around that area of the stock? I would assume even a super fine sandpaper would make it look worse, unless there was a polishing process that could be done to bring the stock back to the original condition. It's not the end of the world, but thought I'd ask.

Thanks.
 
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